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Safety Guidelines for Cycling on an Empty Stomach 

——Experiences gained through blood and tears with fellow riders


Three Danger Zones of Fasted Training

At 6 o’clock this morning, my teammate Aqiang suddenly felt dizzy when he rode 30 kilometers on an empty stomach – a typical low blood sugar crash . EF team nutritionist Gilling’s warning was very straightforward: “On an empty stomach, the body is like a hybrid car without gasoline. Forcing high power will only cause a breakdown.”

Danger List :
High Intensity Training No-Go Zones :

Intensity above zone 2 (heart rate > 83%) will immediately consume carbohydrate reserves

Real case: Last week at the club competition, Lao Wang retired from the competition due to muscle cramps after sprinting on an empty stomach

Reduced immunity :

INEOS Team Doctor Data: After three consecutive days of fasting training, the risk of upper respiratory tract infection increases by 40%

Our solution: No more than 2 times a week, and always bring vitamin C effervescent tablets

Metabolic imbalance :

Gilling’s “construction worker theory”: long-term fasting will lay off “carb wall demolition workers”

Personal test: After one month of fasting training, my absorption efficiency of energy gels decreased by 27%


 The safest training frequency in 2025

The golden rules of professional drivers :

Morning ride: duration ≤ 2 hours

Intensity ≤ 75% of FTP

Frequency ≤ 2 times/week

Regular carbohydrate supplementation

 Novice transition plan (proven and effective):

  • Week 1: 30 minutes/time (best for commuting)
  • Week 2: 45 minutes + bring emergency glue
  • Week 3: Try a 60-minute formal workout

 The magical effects and taboos of black coffee

This morning, Ajie and I had a life-saving formula :

30 minutes before riding: 200ml black coffee (increases fat burning rate by 10%)

But it is absolutely forbidden to: drink more than 2 cups a day
with fasting high-intensity intervals (last week Xiao Zhang’s heart rate soared to 190 because of this)
(causing dehydration risk)

Important reminder : Smart cycling platform data shows that
sweating increases by 35% when training on an empty stomach . Our current standard configuration is:

750ml water bottle × 2 (including electrolyte tablets)

Keep glucose tablets in your waist bag

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